Gossen Metrawatt M630A Metraohm 413 Digital Measuring Instrument

Gossen Metrawatt, M630A, Metraohm 413 Digital, Low-Value Resistance Measuring Instrument

M630A Includes Only:

• 1 METRAOHM 413 low-resistance ohmmeter
• 1 plug-in measuring cable
• 1 9-volt block battery per IEC 6 LR61
• 1 operating instructions

Features:

• Easy Operation: Operation is very easy. Measurement cables of almost any length can be used thanks to the offset balancing function. Measurement polarity can be reversed, and both measured values are stored in memory for subsequent comparison. Resultant deviations in the measuring results (e.g. possible galvanic voltages) can thus be recognized.
• Offset Balancing: Offset balancing compensates for measurement cable resistance. The offset value is saved to memory and is utilized for all future measurements until balancing is performed once again. The value remains in memory, even after the measuring instrument has been switched off. A variety of measurement cables with resistances of up to 3.5 Ω can be used.
• Protection Against Operator Error: The METRAOHM 413 is protected against inadvertent connection to devices under test with fault voltages of up to 500 V by means of protective devices. Interference Voltage Warning Interference voltage is indicated visually with a red LED, and audibly with an acoustic warning signal. The voltage value is displayed on the LCD as well, as long as the test probe makes contact.

Applications:

• Adjustment of shunts in instrumentation applications
• Testing of electrical connections at busbars in open-pit Mining, in industry, and in houseHold applications
• Testing of cable resistance, wiring, and shunt resistors in printed circuit boards and thick-film circuits
• Measurement of contact resistance in relays, power contactors, and load interrupters
• Measurement of fuse resistance, as well as cable resistance in heavy current circuits
• Testing of coil resistance in transformers, coils, small motors, etc.

The METRAOHM 413 is a battery-powered instrument for the measurement of low-value resistances in electrical systems. Large protective conductor, earthing, equipotential bonding and lightning protection systems can also be tested quickly and safely with the METRAOHM 413. Resistance is measured between reference earth (e.g. an equipotential bonding strip) and any desired points to this end. A measuring current of 200 mA and automatic functions assure reliable measuring results.